Automatic pulse excitation modal parameter identification method and device

• Main Authors: WANG MIN, NIU HUANHUAN, ZAN TAO
• Format: Patent
• Language: English
• Published: 20.01.2016
• Subjects: MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; PHYSICS; TESTING

The invention relates to an automatic pulse excitation modal parameter identification method and device, and belongs to the field of vibration testing instruments. The method achieves the automatic vibration excitation of a tested part through an automatic vibration excitation apparatus, and achieves the control of a vibration excitation force and the collection of a tested signal through a controller, a power amplifier, and a multifunctional data collection card. The device mainly comprises an impact head, a force sensor, a cover body, a spring supporting assembly, a push rod, a yoke, an excitation coil, an iron core, and a pedestal. After the coil is electrified, the coil can drive the iron core to come out and generate a vibration excitation force for the tested part. The force sensor can feed back the vibration excitation force withstood by the tested part, and can achieve the adjustment of the vibration excitation force through adjusting the amplitude and width of a pulse signal. The device solves problems, caused by human factors, of double hit, overloading and poor repeatability of a conventional hand-held type vibration excitation hammer, is compact in structure, is small in size, is high in automation degree, is high in repeatability, is easy to operate, and can improve the precision and efficiency of a modal test.